Creating helper table by filtering out zero-values

Question

Consider the following table in Google Sheets:

   | A   B
 --+-------
 1 | A   5
 2 | B   3
 3 | C   6
 4 | D   0
 5 | E   0 
 6 | F   7
 7 | G   0
 8 | H   2
 9